EP3967358A1 - Vacuum wound care module - Google Patents

Vacuum wound care module Download PDF

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Publication number
EP3967358A1
EP3967358A1 EP21203237.9A EP21203237A EP3967358A1 EP 3967358 A1 EP3967358 A1 EP 3967358A1 EP 21203237 A EP21203237 A EP 21203237A EP 3967358 A1 EP3967358 A1 EP 3967358A1
Authority
EP
European Patent Office
Prior art keywords
wound
vacuum
fluid
reservoir
dressing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP21203237.9A
Other languages
German (de)
English (en)
French (fr)
Inventor
Simon Adams
Stephen Bishop
Bryan Griffiths
Helen Shaw
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Convatec Technologies Inc
Original Assignee
Convatec Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=36337079&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP3967358(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Convatec Technologies Inc filed Critical Convatec Technologies Inc
Publication of EP3967358A1 publication Critical patent/EP3967358A1/en
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/88—Draining devices having means for processing the drained fluid, e.g. an absorber
    • A61M1/882—Draining devices provided with means for releasing antimicrobial or gelation agents in the drained fluid
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/84—Drainage tubes; Aspiration tips
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
    • A61M1/91—Suction aspects of the dressing
    • A61M1/915—Constructional details of the pressure distribution manifold
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/05—Bandages or dressings; Absorbent pads specially adapted for use with sub-pressure or over-pressure therapy, wound drainage or wound irrigation, e.g. for use with negative-pressure wound therapy [NPWT]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F2013/00089—Wound bandages
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F2013/00089—Wound bandages
    • A61F2013/00217—Wound bandages not adhering to the wound
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/80—Suction pumps
    • A61M1/804—Suction pumps using Laval or Venturi jet pumps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/84—Drainage tubes; Aspiration tips
    • A61M1/85—Drainage tubes; Aspiration tips with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/90—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing
    • A61M1/92—Negative pressure wound therapy devices, i.e. devices for applying suction to a wound to promote healing, e.g. including a vacuum dressing with liquid supply means

Definitions

  • the present invention relates to methods, devices and kits for treating a wound with a dressing and vacuum.
  • Vacuum has been used to increase blood flow to wound tissue and to remove exudate from the wound site. It is believed that it has not been recognized that such methods can be effectively combined with gel-forming wound care products placed against the wound to which vacuum is applied.
  • a vacuum wound dressing for covering a wound bed comprising: a wound contact layer comprising a fibrous blend or fibrous material that forms a cohesive gel when wetted by wound exudate; a source of vacuum situated to be separated from the wound bed by the wound contact layer; and a vacuum sealing layer covering the wound contact layer and adapted to retain relative vacuum in the wound contact layer, wherein (i) the dressing is essentially missing a non-gelling, foam layer in which the source of vacuum is situated or (ii) the vacuum sealing layer comprises as an outer layer a foam layer.
  • a vacuum wound care module comprising: an fluid reservoir; a pump module fluidly connected to the irrigation reservoir and adapted for pumping fluid out of the fluid reservoir; a venturi vacuum fitting fluidly connected to the pump module and having a vacuum outlet and a fluid outlet; a fluid connection from the fluid outlet to the fluid reservoir; a trap reservoir fluidly connected to the vacuum outlet; and a second fluid connection that is (i) adapted to be fitted with a wound dressing to provide vacuum and allow removal of wound exudate or (ii) fitted to such a wound dressing such that, when the wound dressing is employed, it provides vacuum and allows removal of wound exudate.
  • the outer dressing used in the vacuum method can include a vacuum sealing outer layer that is film layer 11 , and a foam layer 12 .
  • a vacuum source connector 21 e.g. silicone tubing
  • Film 41 can be, for example, the Opsite TM film dressing from Smith & Nephew (Cambridge, United Kingdom).
  • the vacuum permeable foam layer 12 is separated from direct contact with the wound by wound contact layer 31.
  • the source of vacuum (illustrated as tubing) is favorably separated from the wound by a wound contact layer, or a portion of a wound contact layer.
  • the outer layer of the vacuum sealing layer can be foam layer 312 , with the porosity of the foam layer selected to retain a portion of the vacuum at the wound site.
  • Foam layer 312 is separated from direct contact with the wound by wound contact layer 331 .
  • Vacuum source connector 321 can be slotted through foam layer 312 .
  • the vacuum sealing layer can be, for example, a film layer alone (see Fig. 3 , discussed below), or a foam layer alone (see Fig. 2 ).
  • a foam layer can be provided by the foam layer of the Versiva ® dressing available from ConvaTec (Skillman, NJ).
  • the wound contact layer is, for example, a fibrous blend or fibrous material (e.g., non-woven) that forms a cohesive gel when wetted with wound exudate.
  • a fibrous material can be provided, for example, by the wound contact layer of the Versiva ® dressing (ConvaTec, Skillman, NJ) or by a fibrous mat of sodium carboxymethylcellulose.
  • a fibrous mat of sodium carboxymethylcellulose is available as AQUACEL ® dressing from ConvaTec, as is a similar dressing further including silver.
  • exemplary wound contact layers are provided by Medicel TM , Carboflex TM (which provides an odor absorbent layer with fibrous material for wicking liquid away from the odor absorbent), Hyalofill TM (forming a hyaluronic acid-rich fibrous gel) or Kaltostat TM (containing alginate) dressings from ConvaTec.
  • the vacuum sealing layer serves to limit loss of reduced pressure such that a therapeutically useful degree of reduced pressure pertains at the wound site. Loss of reduced pressure (through the vacuum sealing layer) can be significant if compensated by the source of vacuum. It will be recognized the "vacuum” refers to reduced pressure relative to atmospheric pressure. The vacuum source provides a sufficient reduction in pressure such that a therapeutically useful degree of reduced pressure pertains at the wound site.
  • the wound contact layer can be selected to be effective to adhere the dressing to the wound site, even in the absence of vacuum, and to retain adhesiveness even as it is saturated with exudate liquid. Or, adhesion can be provided at the peripheries of the wound dressing.
  • the vacuum wound dressing can be used with a fluid source connector 141 (here illustrated as a tube).
  • the fluid can be, for example, an irrigating fluid, such as saline or a saline substitute, and can include an anti-infective.
  • the irrigating fluid can be pumped to the wound bed, or drawn by the relative vacuum conveyed by vacuum source connector 121 (and sufficiently retained by vacuum sealing layer 111 ).
  • the wound care dressing(s) used with vacuum provide vacuum sealing layers with maximum pores of greater than 100 micron pore size.
  • a vacuum wound care module can be used to provide vacuum and, optionally, irrigation fluid to a wound.
  • the module can be scaled as a bedside unit, or miniaturized such that it can, for example, be adhered or otherwise affixed near the wound site on a patient.
  • Fluid connectors 261, 262, 263, 264 and 265, vacuum source connector 121 , and fluid source connector 141 make fluid connections as illustrated.
  • the reservoir 251 provides fluid (i) to move through the venturi vacuum unit 253 to generate vacuum and (ii), optionally, provide irrigating fluid for the wound. If the fluid of the reservoir 251 is to provide irrigating fluid, the fluid is physiological saline or saline substitute suitable for irrigating a wound.
  • the pump module 252 can be the mechanical pieces that provide pumping, with or without the components that provide motive force or pumping.
  • the pump module 252 can be adapted to couple with a motor to activate the pump parts, or the pump module 252 can be adapted to be engaged by external electromagnet(s) to activate the pump parts.
  • the venturi vacuum unit 253 will typically have a region in which its internal diameter expands to increase the speed of fluid flow (from the inlet 253A to the fluid outlet 253B ), thereby reducing pressure according to Bernoulli's Principle and providing vacuum at vacuum outlet 253C .
  • Optional diverting valve 254 typically has two operating positions, each adapted to allow flow in the "pump circuit" from the reservoir, through the venturi vacuum unit, and returning to the reservoir.
  • One of the operating positions additionally diverts an amount of flow suitable to provide irrigation fluid to the wound. To at least a certain extent, back pressure from the flow pathway to the wound can help regulate the rate of this diverted flow.
  • Trap reservoir 255 is situated to collect wound exudate and used irrigating fluid before the vacuum draws such spent fluid into the pump circuit. Additional trap reservoirs, and/or sterile filters, can be placed to limit any potential contamination of the pump circuit.
  • the various fluid conduits of the vacuum wound care module can incorporate check valves to help assure that there is no significant flow in an unintended direction. For example, such check valves can prevent flow of reservoir fluid out the vacuum outlet 253C should the pump circuit be temporarily blocked, such as when the diverting valve is switched from one position to the other.
  • a non-gelling, foam is a material that does not gel to a functionally significant extent, and is sufficiently porous to move fluid by capillary action.

Landscapes

  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Veterinary Medicine (AREA)
  • Vascular Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Surgery (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • External Artificial Organs (AREA)
  • Materials For Medical Uses (AREA)
EP21203237.9A 2004-11-05 2005-11-04 Vacuum wound care module Withdrawn EP3967358A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US62548804P 2004-11-05 2004-11-05
EP05825353.5A EP1807145B1 (en) 2004-11-05 2005-11-04 Vacuum wound dressing
PCT/US2005/040189 WO2006052839A2 (en) 2004-11-05 2005-11-04 Vacuum wound dressing
EP14193415.8A EP2883555B1 (en) 2004-11-05 2005-11-04 Vacuum wound care module

Related Parent Applications (3)

Application Number Title Priority Date Filing Date
EP14193415.8A Division EP2883555B1 (en) 2004-11-05 2005-11-04 Vacuum wound care module
EP14193415.8A Division-Into EP2883555B1 (en) 2004-11-05 2005-11-04 Vacuum wound care module
EP05825353.5A Division EP1807145B1 (en) 2004-11-05 2005-11-04 Vacuum wound dressing

Publications (1)

Publication Number Publication Date
EP3967358A1 true EP3967358A1 (en) 2022-03-16

Family

ID=36337079

Family Applications (3)

Application Number Title Priority Date Filing Date
EP21203237.9A Withdrawn EP3967358A1 (en) 2004-11-05 2005-11-04 Vacuum wound care module
EP14193415.8A Expired - Lifetime EP2883555B1 (en) 2004-11-05 2005-11-04 Vacuum wound care module
EP05825353.5A Expired - Lifetime EP1807145B1 (en) 2004-11-05 2005-11-04 Vacuum wound dressing

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP14193415.8A Expired - Lifetime EP2883555B1 (en) 2004-11-05 2005-11-04 Vacuum wound care module
EP05825353.5A Expired - Lifetime EP1807145B1 (en) 2004-11-05 2005-11-04 Vacuum wound dressing

Country Status (11)

Country Link
US (2) US8034037B2 (https=)
EP (3) EP3967358A1 (https=)
JP (1) JP5154228B2 (https=)
CA (2) CA2586437C (https=)
DK (1) DK1807145T3 (https=)
ES (2) ES2901826T3 (https=)
HU (1) HUE028894T2 (https=)
MX (1) MX2007005056A (https=)
PL (2) PL1807145T3 (https=)
SI (1) SI1807145T1 (https=)
WO (1) WO2006052839A2 (https=)

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CA2849596C (en) 2017-10-10
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